BA 1483 then BA 762 at Heathrow
Glasgow → London → Basel
Timetable, London time
16:50BA 1483 from Glasgow at the gate
16:00BA 762 to Basel leaves the gate
23 h 10 apart on the timetable, overnight
BA 762 leaves 23 h 10 after BA 1483 arrives on the timetable: more than half a day, so not a connection we count.